I stumbled upon Project Euler once more since I needed multiple solutions in different languages for a random problem. Til did show it to me like 2 years ago and since then they made these dynamic profil images. Not exactly beautiful, but I wanted to post it on my blog anyway, haha. All of the problems are itself sort of unrelated to anything, however the 10 seconds rule – which is the maximum time your program should take getting the solution – will lead you into new directions of efficient programming. You can even improve your knowledge about other programming languages while implementing the solution in more than only one language.